[zghst]

> Testing worse, through DOM

If you're writing proper tests for React, you don't test directly through the DOM. Using Jest you can mock the DOM to test parts of your component. In my view, a component should not contain everything, only the most essential parts to get a working example of how it functions. Reusable/general functionality is pulled in from mixins or other js modules, which should be testable, without the structure of React, on its own.

> Cannot have post processing steps

This is incorrect, you can create a post processing step in React with a parent component. I used this for a pointer events polyfill in React where it replaces `onPointerEvent` with the appropriate mouse or touch event on a child component.

> Cannot delay rendering after state/props change

You can delay a render by returning false from shouldComponentUpdate, and when you get to the point where you want to render you can use this.forceUpdate().

That being said, React is somewhat misleading as far as Reactive programming goes.